btakita

#!/usr/bin/env bash
curl https://s3.amazonaws.com/heroku-jvm-buildpack-vi/vim-7.3.tar.gz --output vim.tar.gz
mkdir vim && tar xzvf vim.tar.gz -C vim
export PATH=$PATH:/app/vim/bin

vibegui

This can reduce files to ~15% of their size (2.3M to 345K, in one case) with no obvious degradation of quality.

ghostscript -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/printer -dNOPAUSE -dQUIET -dBATCH -sOutputFile=output.pdf input.pdf

Other options for PDFSETTINGS:

• /screen selects low-resolution output similar to the Acrobat Distiller "Screen Optimized" setting.
• /ebook selects medium-resolution output similar to the Acrobat Distiller "eBook" setting.
• /printer selects output similar to the Acrobat Distiller "Print Optimized" setting.
• /prepress selects output similar to Acrobat Distiller "Prepress Optimized" setting.

aras-p

// Just before switching jobs:
// Add one of these.
// Preferably into the same commit where you do a large merge.
//
// This started as a tweet with a joke of "C++ pro-tip: #define private public",
// and then it quickly escalated into more and more evil suggestions.
// I've tried to capture interesting suggestions here.
//
// Contributors: @r2d2rigo, @joeldevahl, @msinilo, @_Humus_,
// @YuriyODonnell, @rygorous, @cmuratori, @mike_acton, @grumpygiant,

bismark64

Two (or three) powerful iterators

If you have some experience working with Ruby you probably had to deal with collections. Collections can be tedious. But TTR (Thanks To Ruby) we have a large arsenal to deal with them!

In this post I'll show you two Ruby iterator methods I really love, thanks to its simplicity and beauty.

My whimsical example

olivierlacan

I'm planning on either writing this up in detail or maybe doing a screencast about screencasting, but I'll give a short version here.

On sound quality:

This matters a lot. In decreasing order of importance:

1. Remove echo. You have to hear this to understand. Set up a mic in front of your mouth and record a sentence. Then, put a thick comforter over you and the mic and say it again at the same distance. Listen to

sethetter

#!/usr/bin/env ruby

# Maximum Subarray

# Using any language or technique, write a program that meets the following criteria:

# Given an array containing positive and negative integers, return the maximum sum that
# can be generated from any contiguous set.

# For example in the following array:

briarsweetbriar

Rails flash messages with AJAX requests

original: http://stackoverflow.com/a/10167659/656428

andreypronin

class SetupHstore < ActiveRecord::Migration
  def self.up
    enable_extension "hstore"
  end
  def self.down
    disable_extension "hstore"
  end
end

theotherzach

class AddHstoreExtension < ActiveRecord::Migration
  def up
    execute 'CREATE EXTENSION hstore'
  end

  def down
    execute 'DROP EXTENSION hstore'
  end
end

Samuirai

minteye is a captcha system where you try to find the original image out of distorted ones. They also have a feature list on their website but they forgot the view from a computer. I fixed it:

There are two ways to crack this captcha easily. I've used the audio challange. There are three different kind of audio messages.

1. move the slider to the right
2. move the slider to the left
3. slider is in the correct position